Number of atoms in the following samples of substances is largest in:
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Number of atoms in the following samples of substances is largest in:
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The de Broglie wavelength of a car of mass 1000 kg and velocity 36 km/hr is :
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Which is the correct order of second ionization potential of C, N, O and F in the following?
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The shape of $$IF_6^-$$ is :
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Bond distance in HF is $$9.17 \times 10^{-11}$$ m. Dipole moment of HF is $$6.104 \times 10^{-30}$$ Cm. The percentage ionic character in HF will be : (electron charge = $$1.60 \times 10^{-19}$$ C)
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The correct order of viscosity of the following liquids will be :
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Which of the following statements/relationships is not correct in thermodynamic changes?
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(1) $$N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)$$, $$K_1$$
(2) $$N_2(g) + O_2(g) \rightleftharpoons 2NO(g)$$, $$K_2$$
(3) $$H_2(g) + \frac{1}{2}O_2(g) \rightleftharpoons H_2O(g)$$, $$K_3$$
The equation for the equilibrium constant of the reaction $$2NH_3(g) + \frac{5}{2}O_2(g) \rightleftharpoons 2NO(g) + 3H_2O(g)$$, $$(K_4)$$ in terms of $$K_1$$, $$K_2$$ and $$K_3$$ is :
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What is the pH of a $$10^{-4}$$ M OH$$^-$$ solution at 330 K, if $$K_w$$ at 330 K is $$10^{-13.6}$$?
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The numbers of protons, electrons and neutrons in a molecule of heavy water are respectively :
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Equimolar solutions of the following compounds are prepared separately in water. Which will have the lowest pH value?
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Monocarboxylic acids are functional isomers of:
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In a face centred cubic lattice, atoms of A form the corner points and atoms of B form the face centred points. If two atoms of A are missing from the corner points, the formula of the ionic compound is :
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Vapour pressure of pure benzene is 119 torr and that of toluene is 37.0 torr at the same temperature. Mole fraction of toluene in vapour phase which is in equilibrium with a solution of benzene and toluene having a mole fraction of toluene 0.50, will be :
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Given :
$$E^\circ_{\frac{1}{2}Cl_2/Cl^-} = 1.36$$ V, $$E^\circ_{Cr^{3+}/Cr} = -0.74$$ V
$$E^\circ_{Cr_2O_7^{2-}/Cr^{3+}} = 1.33$$ V, $$E^\circ_{MnO_4^-/Mn^{2+}} = 1.51$$ V
The correct order of reducing power of the species (Cr, Cr$$^{3+}$$, Mn$$^{2+}$$ and Cl$$^-$$) will be:
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The rate constant of a zero order reaction is $$2.0 \times 10^{-2}$$ mol L$$^{-1}$$ s$$^{-1}$$. If the concentration of the reactant after 25 seconds is 0.5M. What is the initial concentration?
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Smoke is an example of:
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Which has trigonal bipyramidal shape?
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When a small amount of KMnO$$_4$$ is added to concentrated H$$_2$$SO$$_4$$, a green oily compound is obtained which is highly explosive in nature. Compound may be :
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Identify the incorrect statement :
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The magnetic moment of the complex anion $$[Cr(NO)(NH_3)(CN)_4]^{2-}$$ is :
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Identify the incorrect statement:
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The order of reactivity of the given haloalkanes towards nucleophile is :
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The reaction of phenol with benzoyl chloride to give phenyl benzoate is known as :
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Which of the following is the product of aldol condensation?
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The order of basicity of amines in gaseous state is :
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Which of the following polymer is a polyamide?
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H$$_1$$ - Receptor antagonists is a term associated with :
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Glycosidic linkage is actually an :
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Natural glucose is termed D-glucose because :
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